Physics : PRE Medical Entrance Question Bank
(Paper - 5)

1. When different parts of a metal are kept at different temperature and current is passed through it, heat is either evolved or absorbed. The effect is called
A. Peltier effect
B. Seebeck effect
C. Thompson effect
D. Joule effect

2. A storage battery is to be charged from a d.c. supply which terminal of the battery be connected to the positive side of the line
A. positive
B. negative
C. both positive and negative
D. first negative and after the lapse of 5 minutes positive

3. The force between two parallel wires carrying currents in the same direction is a
A. force of attraction
B. force of repulsion
C. no resultant force between the wires
D. resultant force acting perpendicular to the flow of wires

4. The motion of an electric charge produces
A. only an electric field
B. only a magnetic field
C. both magnetic and electric field
D. none of the above

5. An ammeter is connected in series with a 2V circuit containing a 2V battery when the switch is closed, the ammeter shows high deflection and comes to zero. The circuit may contain a
A. resistance of 20W
B. fuse
C. diode
D. triode

6. Ferromagnetic substances have
A. very high permeability and susceptibility
B. low permeability but high susceptibility
C. high permeability and low susceptibility
D. none of these

7. The permeability of the paramagnetic substance is
A. very large
B. very small
C. negative
D. small but more than 1

8. When a material is subjected to a small field H, the intensity of magnetisation is proportional to
A. ÖH
B. H
C. H²
D. 1/ÖH

9. In a capacitance circuit the resistance is
A. w C
B. 1/w C
C. 1/Öw C
D Öw x C

10. In electromagnetic induction, the induced e.m.f. is independent of
A. change of flux
B. time
C. number of lines of force
D. resistance of the cells
 

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